Science Archives Publication System

The shape of a sublimating ice surface at the bottom of a non-volatile cylinder: Monte Carlo simulations and 2-D analysis

DOI: 10.1016/S0273-1177(97)00953-8 Bibcode: 1998AdSpR..21.1599M

Keller, H. U.; Markiewicz, W. J.; Skorov, Yu. V.

Gas flow rate at a cometary surface depends on the microscopic structure of the porous dust-ice material that makes up the nucleus. The standard model for the structure of such material is a bundle of cylindrical, non-crossing tubes. Even within this idealized model the emergent flux depends on the shape of the sublimating ice surface at the botto…

1998 • Advances in Space Research

Giotto 0

The Ulysses mission.

Bibcode: 1998SciAm.278a..52S

Smith, E. J.; Marsden, R. G.

Of the dozens of spacecraft sent to explore the solar system, only Ulysses has veered far from the ecliptic. Now looping over the sun's poles in an orbit as wide as Jupiter's, Ulysses has a unique view of the solar wind that is advancing stellar astrophysics.

1998 • Scientific American

Ulysses 0

AGB Stars and Supergiants in the Bar of the LMC

DOI: 10.1023/A:1001572731859 Bibcode: 1998Ap&SS.255..401J

Omont, A.; Blommaert, J.; Loup, C. +2 more

1998 • Astrophysics and Space Science

ISO 0

Ulysses Finishes Its First Revolution Around the Sun

DOI: 10.1007/s001140050534 Bibcode: 1998NW.....85..467K

Keppler, Erhard

Results are presented of the Ulysses mission during its first orbit. There are new insights into the structure of the interplanetary magnetic field, the role of interstellar neutrals within the heliosphere, the acceleration of charged particles to very high energies in corotating interaction regions, the effect of these regions on the propagation …

1998 • Naturwissenschaften

Ulysses 0

Relation between Stellar Evolution and Circumstellar Processes

DOI: 10.1023/A:1001186029674 Bibcode: 1998Ap&SS.255....3M

Maeder, André

1998 • Astrophysics and Space Science

ISO 0

ISOPHOT Observations of Early-type Stars

DOI: 10.1023/A:1001160112353 Bibcode: 1998Ap&SS.255..145B

Leitherer, C.; Owocki, S. P.; Blomme, R. +4 more

1998 • Astrophysics and Space Science

ISO 0

Transonic Decretion Discs Around be Stars

DOI: 10.1023/A:1001120531008 Bibcode: 1998Ap&SS.255..155O

Okazaki, A. T.

1998 • Astrophysics and Space Science

ISO 0

Stellar uvbybeta photometry in three EUV shadow directions

DOI: 10.1051/aas:1998240 Bibcode: 1998A&AS..130..477K

Knude, J.

We present the uvbybeta data used to locate the dust and derive distances for nearby diffuse interstellar clouds in the EUV shadows lb27-31, lb165-32 and lb329+46 discovered by the Extreme Ultraviolet Explorer. The photometrically derived parallaxes of our program stars are compared to the parallaxes listed in the Hipparcos Catalog. Within the pho…

1998 • Astronomy and Astrophysics Supplement Series

Hipparcos 0

Fast and Accurate Inflight Calculations of Electron Space Plasma Parameters

DOI: 10.1029/GM102p0275 Bibcode: 1998GMS...102..275C

Fazakerley, A. N.; Carter, P. J.; Gowen, R. A. +2 more

Satellite and rocket borne experiments impose unique requirements on the systems that control them. High input data rates from sensors have to be coupled to a limited spacecraft telemetry resource. A suite of algorithms designed to ensure the most effective possible use of the telemetry allocation for an instrument studying space plasma electrons …

1998 • Geophysical Monograph Series

Cluster 0

Cassini Huygens mission : the exploration of the Saturn system. Radio science experiments : Radio Frequency Instrument Subsystem

DOI: 10.1016/S0032-0633(97)00212-2 Bibcode: 1998P&SS...46.1333P

Perrot, Bruno; Giordani, Roberto

Many of the Cassini radio science experiments will require very stable microwave signals from the ground station that are transponded phase coherently on board the spacecraft. The Radio Frequency Instrument Subsystem is designed to provide this latter capability with high performance downlink signals at S-band and Ka-band. The signal level and pha…

1998 • Planetary and Space Science

Cassini 0